High-Performance PMOS Devices on (110)/<111'> Substrate/Channel with Multiple Stressors

Abstract

A study was performed to investigate the effect of multiple stressors on CMOS devices on (110) and (100) substrates with different channel directions. For the first time, 87% ION-IOFF improvement is achieved by utilizing SiGe-S/D and compressive contact etch stop layer (c-CESL) for PMOS devices on (110) substrate with lang111'rang channel direction. The improvement is similar to that on conventional (100) substrate with lang110>rangchannel direction and can be explained by piezoresistive coefficients. Record PMOS device performance of Ion = 900 muA/mum at Ioff = 100 nA/mum and VDD = 1.0V for 40nm gate length is demonstrated